Technical Specifications:
The document outlines the technical features of PVC-U pressure relief valves. The nominal pressure is specified, and dimensions are provided in millimeters. The valve material is PVC, with diaphragm options of EPDM or PTFE coated. The temperature range for operation is between -10°C to 60°C for PVC and -20°C to 80°C for PP, and -30°C to 120°C for PVDF.

Procedures:
The valve operates by a set spring force pressing the diaphragm onto the seal seat. If system pressure exceeds the operating pressure, the valve opens. The operating pressure is adjustable with a screw and can be secured with a lock nut. The setting can also be lead-sealed if required.

Standards and Recommendations:
Coupling standards include solvent welded metric spigots. All parts in contact with the medium are made of high-resistance plastics. No auxiliary energy is required for valve operation.

Key Features:
The shape of the housing assists flow, resulting in good flow values. The document emphasizes that all descriptions and illustrations are for guidance only and do not constitute a sale by description. Dimensions are nominal, and changes can occur without prior notice.

Manufacturer Information:
The valves are produced by Polypipe Italia, located in Cicagna, Italy. Contact information includes a phone number and email for support.

Disclaimer:
The information is provided "as is" and is not intended to have any legal effect. The document is copyrighted by Polypipe Italia, and reproduction without consent is prohibited.